Amazon.com: Smraza Raspberry Pi 4 Touchscreen with Case, Cooling Fan, 4 inch Touch Screen IPS LCD Display 800x480 HDMI Monitor for RPI 4B 2GB/4GB/8GB with Touch Pen, Heatsinks(Support Raspbian Kali Octopi Ubuntu) :
Amazon.com: Broonel Grey Fine Point Digital Active Stylus Pen Compatible with The ASUS ZenScreen Touch MB16AMT Portable Monitor : Cell Phones & Accessories